Upcoming certification of Safran’s new APU progressing

The test campaign of the Safran Power Units SPU300[BA] is progressing successfully towards its upcoming technical standard order (TSO) certification. This state-of-the-art auxiliary power unit (APU), especially designed for long-range, high-performance business jets, just completed closed loop electromagnetic interference (EMI) testing, effectively concluding the certification test campaign for TSO.

The SPU300[BA] has accumulated over 1300 operating hours and more than 1000 starts across four flight test aircraft to date.
The SPU300[BA] has accumulated over 1300 operating hours and more than 1000 starts across four flight-test aircraft to date. Safran Photo
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The SPU300[BA] had already completed key tests such as tailcone compatibility, containment and altitude starting/operation.

More recently, the 150-hour endurance test was successfully completed in April 2017. This was an important milestone in the certification process, demonstrating the high reliability and durability of the APU while operating at high loads and temperatures. The SPU300[BA] performed flawlessly, and a post-test inspection of the hardware showed it was in excellent condition.

The test program, which was performed in Toulouse, France and San Diego, Calif., included seven APUs and two prototype tailcones.

“Throughout this extensive test campaign, the SPU300[BA] has consistently demonstrated that it is a unique engine system in terms of its outstanding performance, high system reliability and rugged design. It provides operators with a new standard in APU design, and it will enable aircraft operations never before possible in a business jet” stated François Tarel, chief executive officer of Safran Power Units.

Since November 2016, the SPU300[BA] has been undergoing parallel flight testing as part of the Bombardier Global 7000 business jet certification campaign. The SPU300[BA] has accumulated over 1300 operating hours and more than 1000 starts across four flight-test aircraft to date.

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The SPU300[BA] is undergoing the most rigorous testing required by the FAA, and it will be certified to the latest standard. In addition to the TSO certification requirements, the SPU300[BA] will be certified for extended-range operations with two-engine airplanes (ETOPS). FAA certification is expected by the end of 2017.

The SPU300[BA], which has demonstrated reliable starting up to 13,716 metres, provides electrical power up to 60 kilovolt-amperes at 13,716 metres, and 40 kilovolt-amperes up to 15,545 metres.

On the ground, the SPU300[BA] provides ample air for conditioning the cabin and starting the main engines, while providing the electrical power required to meet the demands of the aircraft. The SPU300[BA] is also equipped with a leading edge control system, allowing for effective troubleshooting and monitoring of key parameters for preventive maintenance.

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